User's Manual for NEMESIS and PLMODE.
Abstract
The normal mode model, NEMESIS, was designed and implemented at the Applied Research Laboratories, The University of Texas at Austin (ARL:UT), to aid in the investigation of low frequency, range invariant, acoustic propagation effects. The mathematical basis and numerical scheme of this model are described by Gonzalez and Hawker (1980). NEMESIS computes the eigenvalues and normal modes of the depth separated acoustic wave equation. Group velocities and modal attenuation terms are alos computed. Propagation loss and velocity potential for a source and receiver at a given range can be calculated from these quantities (Gonzalez and Hawker, 1980). A computer model, PLMODE, was designed to perform these computations, and the computer code for both NEMESIS and PLMODE was prepared for export to other research laboratories. This report is designed to accompany this software and to assist persons who wish to use it. The contents include descriptions of the modeled environment, the input data and their format, and the output produced by the models. An explanation of the diagnostic messages that may arise during execution of the models is also included. Estimates of memory requirements and execution times are given along with sample data sets and their resulting output.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1980
- Accession Number
- ADA087254
Entities
People
- Ruth Gonzalez
- Susan G. Payne
Organizations
- University of Texas at Austin